java.lang.IllegalStateException: Already connected

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java.lang.IllegalStateException: Already connected
at java.net.URLConnection.checkNotConnected(URLConnection.java:463)
at java.net.URLConnection.setDoOutput(URLConnection.java:877)
at damasoft.agata.Page1$InvioDati.onPostExecute(Page1.java:107)
at damasoft.agata.Page1$InvioDati.onPostExecute(Page1.java:60)
at android.os.AsyncTask.finish(AsyncTask.java:651)
at android.os.AsyncTask.access$500(AsyncTask.java:180)
at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:668)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:158)
at android.app.ActivityThread.main(ActivityThread.java:7230)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)

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